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Conferences > NLO > 2017 > NW3A > NW3A.3

Ultrafast Nonlinear Response of Silicon Carbide to Intense THz Fields

Abebe T. Tarekegne, Krzysztof Iwaszczuk, Korbinian Kaltenecker, Binbin Zhou, Weifang Lu, Hayian Ou, and Peter Uhd Jepsen

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Abstract

We demonstrate ultrafast nonlinear absorption induced by strong, single-cycle THz fields in bulk, lightly doped 4H silicon carbide. A combination of Zener tunneling and intraband transitions makes the effect as at least as fast as the excitation pulse. The sub-picosecond recovery time makes the observed response the fastest nonlinear modulation scheme for THz signals reported so far.

© 2017 Optical Society of America

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